package string;
/**
 * String和StringBuilder的性能测试
 * 1.String是不便对象, 因此不适合频繁修改内容, 开销大,
 * */
public class StringAndStringBuilder {
    public static void main(String[] args) {
        /*
        String str = "a";
        for(int i = 0; i<1000000;i++){//100万次
            str = str +"a";
        }
        System.out.println("执行完毕");
         */
        StringBuilder builder = new StringBuilder("a");
        for(int i=0; i<1000000; i++){
            builder.append("a");
        }
        System.out.println("执行完毕");
    }
}
